System and method for configuring controlling device functionality

ABSTRACT

A controlling device is automatically configured to issue a communication directly to a first controllable appliance to control a functional operation of the first controllable appliance in the event that the first controllable appliance is determined to be unresponsive to a command communication transmitted to the first controllable appliance via a digital communications link or to issue a communication to a second controllable appliance to control the functional operation of the first controllable appliance via a digital communications link in the event that first controllable appliance is determined to be responsive to a command communication transmitted to the first controllable appliance via a digital communications link.

RELATED APPLICATION INFORMATION

This application claims the benefit of and is a continuation of U.S.application Ser. No. 15/180,188, filed on Jun. 13, 2016, whichapplication claims the benefit of and is a continuation of U.S.application Ser. No. 14/676,556, filed on Apr. 1, 2015, whichapplication claims the benefit of and is a continuation of U.S.application Ser. No. 13/240,604, filed on Sep. 22, 2011, the disclosuresof which are incorporated herein by reference in their entirety.

BACKGROUND

Consumer electronic appliances such as set top boxes for receiving anddecoding cable and satellite signals, televisions, DVD players, gamesystems, etc. are well known in the art, as are the hand heldcontrolling devices, for example remote controls, which may be providedfor use in issuing commands to these appliances. Frequently, suchcontrolling devices may be “universal,” that is, capable of issuingcommands suitable for the control of more than one appliance ofdiffering type and/or manufacture.

Increasingly, the interconnections between consumer appliances such asthose mentioned above may take the form of digital interfaces basedupon, for example, the High-Definition Multimedia Interface (HDMI)standard. The utilization of such digital interconnections mayfacilitate the exchange of identity information, commands, andcapability data between devices and/or the discovery of system topology,which information may be advantageously used when configuring acontrolling device.

SUMMARY OF THE INVENTION

This invention relates generally to systems in which a universalcontrolling device may be configured for use in conjunction withmultiple interconnected consumer electronic appliances. In particular,when the interconnection(s) between appliances take the form of adigital interface such as contemplated for example by the HDMI standard,the additional features and functionality of such an interconnectionarrangement may be advantageously utilized during configuration andoperation of a controlling device associated with that system. Thecapabilities of individual appliances may be discovered, assessed, andcontrol methods adjusted accordingly, for example substituting directdigital commands issued over the interconnecting bus for wirelessinfrared or RF command transmissions from a portable controlling devicewhere appropriate. System topologies (e.g., which outputs of whichappliance are connected to which inputs of which other appliance(s)) maybe established via direct interrogation or by monitoring of digitalstatus during setup, and applied thereafter to the configuration ofcontrolling device and appliance functionality, etc.

In an exemplary embodiment presented herein by way of illustration, suchdigital discovery, command substitution, and topology determinationmethods are applied to the configuration of a “home” key on a portablecontrolling device, where the function of such a key is to return anentertainment system to a known state.

BRIEF DESCRIPTION OF THE DRAWINGS

For a better understanding of the various aspects of the invention,reference may be had to preferred embodiments shown in the attacheddrawings in which:

FIG. 1 illustrates an exemplary system in which a controlling device anda set top box configured in accordance with the instant invention may beutilized;

FIG. 2 further illustrates the exemplary controlling device of thesystem of FIG. 1;

FIG. 3 illustrates a block diagram of exemplary components of theexemplary controlling device of FIG. 1;

FIG. 4 illustrates a block diagram of exemplary components of theexemplary set top box of FIG. 1;

FIG. 5 illustrates an exemplary series of steps which may be performedwhen configuring the controlling device of FIG. 1; and

FIG. 6 illustrates a further exemplary series of steps which may beperformed when configuring the controlling device of FIG. 1.

DETAILED DESCRIPTION

Turning now to FIG. 1, an exemplary system is illustrated wherein acontrolling device 100 is configurable to control various appliances,such as a set top box (“STB”) 104, a television 106, a DVD player 108,and/or a game console 102. As illustrated, the digital audio/videooutputs of appliances 102, 104 and 108, for example output 118 of STB104, may be attached to digital inputs 112, 114 and 116 of TV 106 inaccordance with, for example, the HDMI standard. As is known in the art,the controlling device 100 may be capable of transmitting commands tothe appliances, using any convenient IR, RF, Point-to-Point, ornetworked protocol, to cause the appliances to perform operationalfunctions. Such transmission protocols may be unidirectional 110 orbidirectional 120 as appropriate for the particular appliance to becontrolled. In a preferred embodiment, communication between controllingdevice 100 and at least one of the appliances, e.g., STB 104, comprisesa bidirectional link 120.

With reference to FIG. 2, an exemplary controlling device 100 mayinclude, inter alia, keys 204 through 210 for selection of an applianceto be controlled, a key 212 or keys for issuing commands to change theactive input of a selected appliance, a “select” or “OK” key 214, and a“home” key 202 which may be configured to issue a command or commandsintended to restore an appliance to a known state.

Turning now to FIG. 3, for use in commanding the functional operationsof one or more appliances an exemplary controlling device 100 mayinclude a processor 300 coupled to a ROM memory 304, a RAM memory 305, akey matrix 316 (e.g., hard keys, soft keys such as a touch sensitivesurface overlaid on a liquid crystal (LCD), transmitter circuit(s) 312and/or transceiver circuit(s) 310 (it being appreciated that elements310 and 312 may comprise one or more than one transceiver ortransmitter, and may utilize IR and/or RF signaling, in any combinationas appropriate for a particular embodiment), clock and timer logic 326with associated crystal or resonator 328, a power source 324 such as abattery, a non-volatile read/write memory 306 such as Flash, batterybacked up SRAM, etc., and as required for a particular embodiment means302 to provide feedback to the user (e.g., one or more LEDs, display,speaker, and/or the like), an input/output port 318 such as a serialinterface, USB port, modem, Zigbee, WiFi, or Bluetooth transceiver,etc., and means 320 for backlighting a LCD display or keypad.

As will be understood by those skilled in the art, some or all of thememories 304, 305, 306 may include executable instructions that areintended to be executed by the processor 300 to control the operation ofcontrolling device 100, as well as data which serves to define to theoperational software the necessary control protocols and command valuesfor use in transmitting command signals to controllable appliances(collectively, the command data). In this manner, the processor 300 maybe programmed to control the various electronic components within thecontrolling device 100, e.g., to monitor the key matrix 316, to causethe transmission of signals, etc. The non-volatile read/write memory306, for example an EEPROM, battery-backed up RAM, FLASH, Smart Card,memory stick, or the like type of non-transitory, readable media, mayadditionally be provided to store setup data and parameters asnecessary. While the memory 304 is illustrated and described as a ROMmemory, memory 304 can also be comprised of any type of readable media,such as ROM, FLASH, EEPROM, or the like type of non-transitory, readablemedia. Preferably, read/write memories 304 and 305 are non-volatile orbattery-backed such that data is not required to be reloaded afterbattery changes. In addition, the memories 304, 305 and 306 may take theform of a chip, a hard disk, a magnetic disk, an optical disk, and/orthe like. Still further, it will be appreciated that some or all of theillustrated memory devices may be physically combined (for example, asingle FLASH memory may be logically partitioned into different portionsto support the functionality of memories 304 and 306 respectively),and/or may be physically incorporated within the same IC chip as themicroprocessor 300 (a so called “microcontroller”) and, as such, theyare shown separately in FIG. 3 only for the sake of clarity.

To cause the controlling device 100 to perform an action, thecontrolling device 100 may be adapted to be responsive to events, suchas a sensed user interaction with the key matrix 316, detection of atriggering event via an appropriate trigger sensor, etc. In response toan event, appropriate instructions within the program memory (hereafterthe “controlling device operating program”) may be executed. Forexample, when a function key is actuated on controlling device 100, thecontrolling device operating program may retrieve from the command datastored in memory 304, 305, 306 a command value and transmission protocolcorresponding to the actuated function key and, where necessary, currentdevice mode, and transmit that command to an intended target appliance,e.g., TV 106 or STB 104, in a format recognizable by that appliance tothereby control one or more functional operations of that appliance. Itwill be appreciated that the operating program can be used not only tocause the transmission of commands and/or data to the appliances, butalso to perform other operations. While not limiting, other operationsthat may be performed by the controlling device 100 may includedisplaying information/data, favorite channel setup, macro key setup,function key relocation, etc. Examples of local operations may be foundin U.S. Pat. Nos. 5,481,256, 5,959,751, and 6,014,092. Further, in anexemplary embodiment certain operations may comprise interactions withan appliance such as STB 104 via bidirectional communication link 120,as will be described in greater detail hereafter.

In an exemplary embodiment, controlling device 100 may be universal,that is, adaptable to issue commands to a multiplicity of appliances ofdifferent type and/or manufacture. In such cases, for selecting a set ofcommand data to be associated with an appliance to be controlled, datamay be provided to the controlling device 100 that serves to identify anintended target appliance by its type and make (and sometimes model).Such data allows the controlling device 100 to identify the appropriatecommand data and transmission protocol within a preprogrammed library ofcommand data that is to be used to transmit recognizable commands in aformat appropriate for such identified appliances (hereafter a“codeset”). As is known in the art, identification of an appropriatecodeset may comprise entry of a numeric setup code obtained, forexample, from a printed list of manufacturer names and/or models withcorresponding code numbers or from a support Web site; may comprise aninteraction with an appliance such as STB 104 which culminates in thedownloading of command data and/or numeric setup codes to thecontrolling device; may comprise scanning of bar codes or RFID tags;etc. Since such methods for setting up a controlling device to commandthe operation of specific home appliances are well-known, these will notbe described in greater detail herein. Nevertheless, for additionalinformation pertaining to setup procedures, the reader may turn, forexample, to U.S. Pat. Nos. 4,959,810, 5,614,906, 6,225,938, or 7,969,514all of like assignee and incorporated herein by reference in theirentirety.

Turning now to FIG. 4, an exemplary controllable appliance, e.g., STB104, may include, as needed for a particular application, a processor400 coupled to a memory 402 which may comprise RAM, ROM, and/or Flashmemory; a power supply 404; a hard disk (HDD) interface 406 andassociated disk drive 408, for example to support DVR functionality; asmart card and/or PCMIA interface 410 where required to accommodateservice enablement/decryption cards 412; other input/output interfaces414 such as USB, Ethernet, etc.; a front panel interface 418 withassociated front panel keypad 420 and display means 422; a remotecontrol receiver or transceiver 424 for reception of signal from acontrolling device 100; a digital audio/video output interface 426 suchas an HDMI port; a digital audio output 432 such as an SPDIF connection;analog video and audio outputs 430,432; and one or more tuners 416 forreceiving and demodulating a cable or satellite signal. As will beappreciated, in general tuner 416 may be capable of receiving both oneor more digital media streams comprising program content and a so calledout-of-band data stream comprising, for example, program guideinformation, software updates, etc.

As is known in the art, programming instructions may be stored in anon-transitory readable memory 402 (“STB programming”) which whenexecuted by processor 400 may enable the STB appliance 104 to receiveand decode digital media and data streams from tuner 416; to storereceived media content and data on HDD 408 or in memory 402; to outputreceived (from tuner 416) or retrieved (from HDD 408) media content viaone or more of the output ports 426,428; to monitor other I/O ports 414for activity; to receive, decode, and act upon user commands receivedfrom controlling device 100 or input via front panel 420; to displayprogram guide information, listings of stored content, or setup andconfiguration menus at user request and act upon any resulting userinput; etc.

Connection of HDMI interface 426 of STB 104 to a compatible appliancesuch as TV 106 as illustrated in FIG. 1 may enable exchange of digitalinformation between these appliances in accordance with, for example,the Extended Display Identification Data (EDID), Consumer ElectronicsControl (CEC), and/or High-bandwidth Digital Content Protection (HDCP)standards. By way of explanation, EDID defines data which may beprovided by a digital display appliance such as TV 106 to a video sourcesuch as STB 104 to characterize the capabilities and configuration ofthe display device; CEC defines methods by which appliances may exchangecommand and control information over an HDMI link; and HDCP provides amethod for appliances to authenticate one another and exchangeencryption keys in order to effect secure transmission of digital AVmedia content. Since all of these standards are readily available fromtheir respective standards-setting bodies, for the sake of brevity thefeatures and functionality thereof will be further presented herein onlyto the extent necessary for a complete understanding of the instantinvention.

In a system such as that illustrated in FIG. 1 in which variousappliances may be digitally interconnected in accordance with a standardsuch as HDMI, an appliance, for example STB 104, may utilize informationobtainable via such an interconnection to cooperatively participate inthe configuration of a universal controlling device such as controller100. Such cooperation may comprise communication of identifyinginformation regarding the interconnected other appliances to thecontrolling device, as described for example in co-pending U.S. patentapplication Ser. No. 12/716,635, of like ownership and incorporatedherein by reference in its entirety. Alternatively or in conjunctionwith such setup, an appliance such as STB 104 may also engage incooperative determination of system topology and configuration ofcontrolling device features as described herein.

By way of example and without limitation, in an illustrative embodimentof such system topology determination and controlling deviceconfiguration it may be considered advantageous for a controlling device100 offered in conjunction with a STB 104 to be provisioned with a“home” key 202, activation of which may serve to command TV 106 toselect as its active input that port which is connected to STB 104,e.g., port 114 in the illustrative example. Provision of such a featuremay enable a user who has inadvertently switched TV 106 to a differentinput source to immediately restore the source to the STB display. Whilethe illustrative example presented herein is in the context of a “home”key 202 which may be specifically provisioned for this purpose, in otherembodiments such functionality may be equally advantageously offered inconjunction with an existing appliance selection key such as “Cable” 204or “DVD” 210, i.e. activation of key 204 may not only place controllingdevice 100 into an operating mode suitable for controlling STB 104, butmay also command TV 106 to select that input port which is associatedwith viewing STB-sourced content, i.e. port 114; activation of key 210may not only place controlling device 100 into an operating modesuitable for controlling DVD player 108, but may also command TV 106 toselect that input port which is associated with viewing DVD-sourcedcontent, i.e. port 116; etc. Accordingly it will be appreciated thatwhile the methods described below are presented by way of illustrationin terms of enabling a “home’ 202, such methods may be applied, mutatismutandis, to the provision of similar functionality to any suitable keyof a controlling device. In order to enable such a feature, however, itmust first be determined which one of TV inputs 112, 114, 116 isconnected to STB 104, and then determine which explicit input selectcommand, either within the CEC repertoire or within the controllingdevice codeset applicable to TV 106, may command direct selection ofthat specific input in order that the controlling device 100 may beconfigured such that actuation of “home” key 202 may cause anappropriate command to be issued to TV 106.

Accordingly, after controlling device 100 has been initially configuredto command operation of appliances 102 through 108, preferably inconjunction with STB 104 as described for example in the abovereferenced U.S. Pat. No. 7,969,514 or in U.S. patent application Ser.No. 12/716,635, in an exemplary embodiment the STB programming ofappliance 104 and the controlling device operating program ofcontrolling device 100 may cooperatively execute a series of steps toconfigure the functionality of “home” key 202, coordinated wherenecessary over bidirectional communication link 120, as will now bedescribed in conjunction with FIGS. 5 and 6.

With reference to FIG. 5, at step 500 the STB programming may initiallydetermine if a display appliance, e.g., TV 106, is in fact connected toHDMI port 118. If not, retrieval of HDMI-available digital informationfrom the appliance may not be possible, and accordingly theconfiguration process may continue at step 524 whereat otherconfiguration methods may be attempted, for example as describedhereafter in conjunction with FIG. 6. If however an appliance isdetermined to be connected to HDMI port 118, at step 502 thatappliance's EDID data may be retrieved. The EDID data may indicate,inter alia, which HDMI port of the connected appliance is being used tocommunicate with STB 104, e.g., port 114 of TV 106 in the illustrativeexample. Next, at step 504, the STB programming may determine whetherthe attached appliance supports CEC control over the HDMI connection.This determination may be made based on information contained in theretrieved EDID, may be empirically derived based on the appliance'sresponse (or lack thereof) to a CEC query, may be obtained byreferencing a local or remote database of appliance capabilities usingappliance identity information embedded in the EDID or previouslygathered during initial setup of controlling device 100, or any othersuitable method. If it is determined that the appliance does in factsupport CEC control, than at step 526 a CEC command may be issued viathe HDMI interconnection to cause the appliance to select a differentinput as its current AV source. Thereafter, at step 528 the STBprogramming may determine if an HDCP break has occurred as a result ofthe command issued at step 526. By way of explanation, whenever adigital pathway is established between an HDCP compliant source deviceand an HDCP compliant sink device, an authentication process andexchange of encryption keys occurs. Since many sink devices are capableof supporting only one HDCP stream at a time, when sink device inputsare switched the HDCP logical connection with the former source devicemay be terminated and authentication cancelled. If such an HDCP break isdetected, then at step 530 the STB programming may next issue a CECinput select command to return the appliance input to the EDID-indicatedHDMI port to which the STB is purportedly connected. Thereafter, at step532 the STB programming may determine if an HDCP reconnect has occurredas a result of the command issued at step 530. If so, it has beenestablished that the appliance, TV 106 in the illustrative example, maybe successfully switched back to the correct input for display of STBoutput via the use of a CEC command issued over the HDMIinterconnection. Accordingly, at step 534 a message may be communicatedto controlling device 100 to configure “home” key 202 to transmit acommand to STB 104, which command when received by STB 104 will causeissuance of the just-verified CEC input select command to TV 106. Aswill be appreciated, in some embodiments this may in fact comprise thedefault configuration for the controlling device “home” key function, inwhich instances step 534 may be omitted. If either the HDCP break atstep 528 or HDCP reconnect at 532 is unsuccessful, it may be assumedthat input switching via CEC commands is not adequately supported by theappliance, e.g. TV 106, and as indicated in FIG. 5 the STB programmingmay continue at an appropriate point in the controlling device inputselect command test sequence described below.

Returning to step 504, if the STB programming determines that theattached appliance does not support CEC control, at step 508 it maycommunicate with controlling device 100, for example via bidirectionalcommunication link 120, in order to request transmission of apreparatory input selection command to the attached appliance, e.g., TV106. Such a preparatory command, transmitted at step 506, may comprise acommand to select an input to which the STB 104 is not connected. By wayof example, in the illustrative system this may comprise a commandintended to cause TV 106 to switch away from the EDID-indicated HDMIport 114 to which STB 104 is connected, e.g., to one of ports 112 or116. Thereafter, at step 508 the STB programming may determine if anHDCP break has occurred as a result of the command issued at step 506.If not, at steps 518 and 516 other available input selection commandsavailable in the codeset applicable to TV 106 may be sequentiallytested. If no command code is successful in initiating and HDCP break,the STB programming may continue at step 524 where alternativeconfiguration methods may be attempted as described hereafter. Ifhowever an HDCP break is successfully initiated, at steps 510, 512, 522,520 the STB programming may next attempt to determine the input selectcommand which will restore TV 106 to the input port 114 to which STB 104is connected. As illustrated, this may take the form of repetitiverequests to controlling device 100 to cause sequential issuance ofpossible input select command to TV 106 until an HDCP reconnect isdetected by the STB programming. Advantageously, the sequence in whichinput select commands are issued to TV 104 may be determined in part bythe HDMI port number reported by TV 106 as part of the EDID dataretrieved at step 502. By way of example, if the EDID data indicatesthat the connection 114 is to HDMI port number three of TV 106 and acommand labeled “HDMI 3” is present in the controlling device codesetapplicable to TV 106, then that command may be selected as the first tobe attempted. When an HDCP reconnect status is detected by the STBprogramming, at step 514 a message may be communicated to controllingdevice 100 to configure “home” key 202 to transmit the TV input selectcommand code last issued in the test sequence, and configuration iscomplete. If however no HDCP reconnect has been detected upon exhaustionof possible input select codes, at step 524 alternative configurationmethods may be attempted, for example such at that described hereafterin conjunction with FIG. 6.

In those cases where a display device such as a TV is not attached to anSTB via a digital connection, for example is connected to analog AVoutputs 430,432 of STB 104; or where a display device is attached via adigital connection but may not be compatible with the methods describedabove conjunction with FIG. 5, for example a display device whichsupports multiple concurrent HDCP sessions and accordingly does notreliably report HDCP session termination when an input is switched, anexemplary alternate configuration method will now be described inconjunction with FIG. 6. As will become apparent, in the illustrativemethod user feedback may be used in lieu of the HDCP status changedetections of the previous methods. This process may commence at step602 with the STB programming causing display of a message on the TVscreen which message may prompt the user to take the required actions.For example, in the illustrative method, the message may request thatthe user actuate the “OK” key 214 of controlling device 100 once whenthe displayed messages disappears and a second time when the displayedmessage reappears. Thereafter, at step 604 the STB programming mayrequest that the controlling device 100 issue a command to causeselection of an unused input of the TV device. Advantageously, theparticular input command used may be selected from those available inthe current codeset in such a manner as to maximize the probability ofthe selected input being unused. For example in the case of TV 104 whichis known to be interconnected via a digital interface, such an inputselection command may be one presumed to be associated with an analoginput, for example an “antenna” or a “composite video” input selectioncommand. At step 606 it is then determined, after a suitable delay,whether the user has acknowledged disappearance of the displayedmessage, i.e., the STB has received a controlling device transmissioncomprising the command associated with “OK” key 214. If not, thesequence is repeated using a different input select command, via steps608 and 610. Once the user has confirmed in this manner that theselected TV input is no longer that which is connected to the output ofthe STB, at steps 612 through 618 the STB programming may causesequential transmission of available input selection commands until asecond user acknowledgement is received to indicate that the selected TVinput is once again that input which is connected to the STB, asevidenced by reappearance of the displayed message. Again, the order inwhich input select commands are tested may be advantageously adjustedaccording to known factors, for example starting with the EIDIDindicated port in the case of a digitally attached device; starting withknown non-HDMI, non-DVI inputs in the case of an analog attached device;etc. Upon receiving the second user acknowledgement, at step 620 the STBprogramming may forward an indication to controlling device 100 that theTV input select command code last issued in the test sequence should beassigned to “home” key 202, and configuration is complete. If however afirst or second user acknowledgement is not received prior to exhaustionof all possible input selection commands present in the current codeset,then at step 622 an indication may be issued to the user that automaticconfiguration of the “home” key is not possible. To ensure that itreaches the user regardless of the current state of the TV inputs, suchan error indication may comprise, for example, not only an attempteddisplay on the TV screen, but also a message on STB front panel 422,activation of user feedback mechanism 302 of controlling device 100,etc.

While various concepts have been described in detail, it will beappreciated by those skilled in the art that various modifications andalternatives to those concepts could be developed in light of theoverall teachings of the disclosure. For example, while the majority ofthe steps of the exemplary method of FIGS. 5 and 6 are described asperformed by the STB programming, it will be appreciated that in otherembodiments many of these steps may be equally well performed by thecontrolling device operating program. Additionally, while presented byway of illustration in the context of configuration of a “home” key of auniversal controlling device, it will be appreciated that the methodsdescribed herein may be generally applied to the configuration andoperation of digitally interconnected systems of electronic appliances,for example without limitation the configuration of activity-specificoperations such as “Watch a movie”, “Listen to music”, “Browse the web”,etc.; the determination of favorite equipment configuration settings andrestoration thereto; the capture of individual user preferences; etc.

Further, while described in the context of functional modules andillustrated using block diagram format, it is to be understood that,unless otherwise stated to the contrary, one or more of the describedfunctions and/or features may be integrated in a single physical deviceand/or a software module, or one or more functions and/or features maybe implemented in separate physical devices or software modules. It willalso be appreciated that a detailed discussion of the actualimplementation of each module is not necessary for an enablingunderstanding of the invention. Rather, the actual implementation ofsuch modules would be well within the routine skill of an engineer,given the disclosure herein of the attributes, functionality, andinter-relationship of the various functional modules in the system.Therefore, a person skilled in the art, applying ordinary skill, will beable to practice the invention set forth in the claims without undueexperimentation. It will be additionally appreciated that the particularconcepts disclosed are meant to be illustrative only and not limiting asto the scope of the invention which is to be given the full breadth ofthe appended claims and any equivalents thereof.

All patents cited within this document are hereby incorporated byreference in their entirety.

What is claimed is:
 1. A method for configuring a controlling device tocontrol a functional operation of a second controllable appliance thatis communicatively coupled to a first controllable appliance,comprising: receiving at the controlling device from the firstcontrollable appliance data indicative of a communications port of thesecond controllable appliance to which the first controllable applianceis communicatively coupled; using by the controlling device the dataindicative of the communications port of the second controllableappliance as received from the first controllable appliance toautomatically configure an input element of the controlling devicewhereupon a subsequent activation of the input element of thecontrolling device will cause the controlling device to transmit acommand for causing the second controllable appliance to make active thecommunications port of the second controllable appliance to which thefirst controllable appliance is communicatively coupled.
 2. The methodas recited in claim 1, wherein the first controllable appliance obtainsthe data from the second controllable appliance via use of aHigh-Definition Multimedia Interface (HDMI) communications couplingbetween the first controllable appliance and the second controllableappliance.
 3. The method as recited in claim 2, wherein the datacomprises Extended Display Identification Data (EDID) data whichindicates which HDMI communications port of the second controllableappliance is being used to exchange communications with the firstcontrollable appliance.
 4. The method as recited in claim 2, wherein thedata is obtained from the second controllable appliance via use of aConsumer Electronics Control (CEC) query issued from the firstcontrollable appliance to the second controllable appliance via the HDMIcommunications coupling.
 5. The method as recited in claim 1, whereinactivation of the input element of the controlling device will alsocause the controlling device to place itself into an operating modesuitable for controlling functional operations of the first controllableappliance.
 6. The method as recited in claim 5, wherein the firstcontrollable appliance comprises a media source device and wherein thesecond controllable appliance comprises a media sink device.
 7. Themethod as recited in claim 6, wherein the media source device comprisesa set top box device and the media sink device comprises a television.8. The method as recited in claim 6, wherein the media source devicecomprises a removeable media playing device and the media sink devicecomprises a television.